How many children are hospitalized/die from swallowing coins or lego?
Do we need warning labels on coins?
How many kids are hospitalized/die from swallowing batteries? I'd bet it's a lot more than magnets, and batteries can be pretty lethal.
However that doesn't help us much. Strong magnets are far more prevalent now and the specific toys that caused most injuries weren't around in the UK, I think (?), back then.
Moreover, that probably makes magnet injuries per item in the home massively outweigh coin injuries.
I looked for EU IDB stats too but didn't get anywhere, my starting source was http://www.rospa.com/resources/statistics/ which lists some other potential data sources at the bottom.
For button batteries:
poison.org[1] lists 54 fatalities since 1977; the Children's Hospital of Philadelphia has a page [2] that mentions "Fifteen children have died — 11 of them within the last six years" but it isn't clear when exactly that page was published.
[1]http://www.poison.org/battery/fatalcases
[2] http://www.chop.edu/centers-programs/kohls-injury-prevention...